Treatment for Neisseria meningitis includes which combination?

• A. Ceftriaxone and vancomycin
• B. Penicillin G
• C. Amoxicillin
• D. Doxycycline

Answer: (A)

In acute bacterial meningitis, start broad, then narrow once the pathogen and its susceptibilities are known. The best initial regimen to cover Neisseria meningitidis and potential resistant pneumococcus is a third-generation cephalosporin (ceftriaxone) plus vancomycin. Ceftriaxone effectively treats Neisseria meningitidis and many other meningitis pathogens, while vancomycin protects against penicillin-resistant Streptococcus pneumoniae and other resistant gram-positives. This combination provides the most reliable coverage until culture results guide narrowing.

Penicillin G could be used if the organism is confirmed and susceptible, but empirically it won’t cover resistant strains or all possible meningitis pathogens. Amoxicillin isn’t the preferred agent for meningitis due to penetration and spectrum concerns, and doxycycline does not achieve reliable CNS concentrations for acute meningitis.